package com.example.day3;

/**
 * @author zjianfa
 */
public class StringStudy {
    public static void main(String[] args) {
        // int long short
        String s = "1212";
        System.out.println(s.length());
        System.out.println(s.charAt(2));

        char c = 'd';

        // char
        Character cc = 'd';
        System.out.println(Character.isUpperCase(c));


    }
}
